CE-413 Computer Networks & Data Communication-I

Assignment 5

Date of Submission: 7^th May, 2009

1. Explain how the ALOHA protocol answers this question: When should the station access the medium?
2. Explain how the ALOHA protocol answers this question: What should be done if the medium is busy?
3. Explain how the ALOHA protocol answers this question: How should the station determine the success or failure of the transmission?
4. Explain how the ALOHA protocol answers this question: What should the station do if there is an access conflict?
5. Explain how the CSMA/CD protocol answers this question: When should the station access the medium?
6. Explain how the CSMA/CD protocol answers this question: What should be done if the medium is busy?
7. Explain how the CSMA/CD protocol answers this question: How should the station determine the success or failure of the transmission?
8. Explain how the CSMA/CD protocol answers this question: What should the station do if there is an access conflict?
9. Explain how the CSMA/CA protocol answers this question: When should the station access the medium?
10. Explain how the CSMA/CA protocol answers this question: What should be done if the medium is busy?
11. Explain how the CSMA/CA protocol answers this question: How should the station determine the success or failure of the transmission?
12. Explain how the CSMA/CA protocol answers this question: What should the station do if there is an access conflict?
13. Explain how the token-passing protocol answers this question: When should the station access the medium?
14. Explain how the token-passing protocol answers this question: What should be done if the medium is busy?
15. Explain how the token-passing protocol answers this question: How should the station determine the success or failure of the transmission?
16. Explain how the token-passing protocol answers this question: What should the station do if there is an access conflict?
17. Show the Walsh table for W₁₆?
18. Prove the second property of orthogonal sequences for any two entries of your choice in W₁₆?
19. Prove the third property of orthogonal sequences for any two entries of your choice in W₁₆?
20. Show the output of multiplexer given in the figure below, if station 1 is silent and every other station are sending a bit 1.

21. Show the output of demultiplexer for problem 20.
22. Do excercise no 31. Chapter No.11 Behrouz Forouzan 4/ed